CN114676615B - Tool compensation profile construction error assessment method, device, equipment and medium - Google Patents
Tool compensation profile construction error assessment method, device, equipment and medium Download PDFInfo
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Abstract
The embodiment of the application discloses a method, a device, equipment and a medium for evaluating construction errors of a tool compensation molded surface, wherein the molded surface of a composite material part is obtained by processing the molded surface of a theoretical composite material part which needs curing deformation simulation and tool compensation; meshing the molded surface of the composite material part, and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result; performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file; processing the tool compensation result file to obtain a profile before deformation and a profile after compensation; obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile; and evaluating the construction error of the tooling compensation molded surface of the composite material part according to the construction errors of the molded surface before deformation, the molded surface after compensation and the first molded surface. The accurate evaluation of the construction error of the tool compensation molded surface is realized.
Description
Technical Field
The application relates to the technical field of aircraft manufacturing, in particular to a method, a device, equipment and a medium for evaluating construction errors of a tool compensation molded surface.
Background
In order to solve the influence of the composite material curing deformation on the final forming quality of the component, the method is popular in the analysis method of carrying out accurate composite material curing deformation simulation based on finite element analysis software, and establishing a composite material tool compensation molded surface according to a simulation result so as to improve or even eliminate the influence of the composite material curing deformation. The improvement of the tool compensation type surface on the curing deformation of the composite material is based on manufacturing a composite material forming tool by adopting the tool compensation type surface and manufacturing a composite material part on the compensation tool, so that the shape of the composite material part subjected to curing deformation is in accordance with an expected theoretical shape.
In the design of the existing tool compensation molded surface, when a tool compensation model is created, the problems that the molded surface is fluctuated in the inner part of a part, the part is warped in a margin area, a positioning hole cannot be accurately positioned and the like cannot be solved, and the engineering application of the tool compensation molded surface cannot be met. Therefore, a method for evaluating the construction error of the composite material tooling compensation profile based on engineering application is needed to evaluate whether the tooling compensation profile meets the requirement of pneumatic shape error.
Disclosure of Invention
The application mainly aims to provide a method, a device, equipment and a medium for evaluating the construction error of a tool compensation profile, and aims to evaluate the construction error of the tool compensation profile.
In order to achieve the above object, the present application provides a method for evaluating a construction error of a tool compensation profile, including:
processing the profile of the theoretical composite part needing curing deformation simulation and tool compensation by using geometric processing software to obtain the profile of the composite part;
meshing the molded surface of the composite material part by using simulation software, and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result;
performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file;
processing the tool compensation result file by using the geometric processing software to obtain a profile before deformation and a profile after compensation;
obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile;
and evaluating the construction error of the tooling compensation molded surface of the composite material part according to the construction errors of the molded surface before deformation, the molded surface after compensation and the first molded surface.
Optionally, the first profile build error comprises: and the distance error, perimeter error, area error and positioning hole position error of the profile before deformation and the profile of the theoretical composite part.
Optionally, the evaluating the tooling compensation profile construction error of the composite part profile according to the pre-deformation profile, the post-compensation profile and the first profile construction error includes:
obtaining a second profile construction error according to the profile before deformation and the compensated profile;
and evaluating the tooling compensation profile construction error of the profile of the composite part according to the first profile construction error and the second profile construction error.
Optionally, the evaluating the tooling compensation profile construction error of the composite material part profile according to the first profile construction error and the second profile construction error includes:
obtaining a tool compensation profile construction error value of the profile of the composite part according to the first profile construction error and the second profile construction error;
and evaluating the construction error of the tool compensation molded surface of the composite material part according to the construction error value and the error threshold value of the tool compensation molded surface.
Optionally, the second profile building error comprises: the distance error, perimeter error, area error and positioning hole position error of the profile before deformation and the profile after compensation.
Optionally, the deformation simulation result includes coordinates of nodes before deformation, coordinates of nodes after deformation and deformation of all grid nodes on the profile of the theoretical composite part; the tool compensation calculation is carried out according to the deformation simulation result to obtain a tool compensation result file, and the tool compensation result file comprises the following steps:
according to the coordinates of the nodes before deformation, the coordinates of the nodes after deformation and the deformation, tool compensation calculation is carried out to obtain coordinates of the nodes after compensation;
and obtaining the tool compensation result file according to the compensated node coordinates and the pre-deformation node coordinates.
Optionally, after evaluating the tooling compensation profile construction error of the composite part profile according to the pre-deformation profile, the post-compensation profile and the first profile construction error, the method further includes:
and if the construction error of the tooling compensation molded surface of the composite material part does not meet the preset error condition, returning to the step of meshing the molded surface of the composite material part by using simulation software and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result, and circulating the construction error of the tooling compensation molded surface of the composite material part to meet the preset error condition.
In addition, in order to achieve the above object, the present application further provides a tool compensation profile construction error evaluation device, including:
the first profile creating module is used for processing the profile of the theoretical composite part to be subjected to solidification deformation simulation and tool compensation by using geometric processing software to obtain the profile of the composite part;
the deformation simulation module is used for meshing the molded surface of the composite material part by using simulation software and performing deformation simulation operation by using the molded surface of the composite material part after meshing to obtain a deformation simulation result;
the tool compensation module is used for performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file;
the second profile creating module is used for processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation;
the error construction module is used for obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile;
and the error evaluation module is used for evaluating the tooling compensation profile construction error of the composite part profile according to the pre-deformation profile, the post-compensation profile and the first profile construction error.
In addition, to achieve the above object, the present application further provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above method.
In addition, to achieve the above object, the present application further provides a computer readable storage medium, where a computer program is stored, and a processor executes the computer program to implement the above method.
The beneficial effect that this application can realize.
According to the method, the device, the equipment and the medium for evaluating the construction error of the tool compensation molded surface, the molded surface of a theoretical composite part needing curing deformation simulation and tool compensation is processed by utilizing geometric processing software, and the molded surface of the composite part is obtained; meshing the molded surface of the composite material part by using simulation software, and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result; performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file; processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation; obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile; and evaluating the construction error of the tooling compensation molded surface of the composite material part according to the construction errors of the molded surface before deformation, the molded surface after compensation and the first molded surface. Namely, the method separates the profile construction errors, so that the quantitative evaluation can be carried out, and the problem that the displacement is compensation amount or profile error which cannot be directly evaluated because the tool compensation profile has larger displacement relative to the original theoretical profile is avoided. The accurate evaluation of the construction error of the tool compensation molded surface is realized.
Drawings
FIG. 1 is a schematic diagram of a computer device in a hardware operating environment according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a tool compensation profile construction error evaluation method according to an embodiment of the present application;
fig. 3 is a functional module schematic diagram of a tool compensation profile construction error evaluation device according to an embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The main solution of the embodiment of the application is as follows: processing the profile of the theoretical composite part needing curing deformation simulation and tool compensation by using geometric processing software to obtain the profile of the composite part; meshing the molded surface of the composite material part by using simulation software, and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result; performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file; processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation; obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile; and evaluating the construction error of the tooling compensation molded surface of the composite material part according to the construction errors of the molded surface before deformation, the molded surface after compensation and the first molded surface.
According to analysis and discovery, in the profile compensation method, the processed composite profile is subjected to a processing process of importing simulation software, meshing to form grid elements and nodes, simulation calculation, outputting grid nodes in a result, and processing a molding surface in CATIA software, wherein the processes of meshing and re-creating the molding surface in the process have influence on the profile precision, and the process comprises the following steps: the smoothness, the perimeter, the positioning hole position and other precision requirements of the geometric molded surface. In the design and manufacture process of the composite material part, in particular to the composite material part used for the aerodynamic profile of the airplane, the precision requirements of the smoothness and the like of a geometric profile are very high, the profile error of a forming tool for manufacturing the composite material part is generally required to be less than or equal to 0.lmm, the profile error of a machine tool for milling the composite material part is required to be less than or equal to 0.03mm, if the tool profile is customized according to the design digital model, the requirement of the profile precision of the composite material part can be met, but if the geometric profile subjected to tool compensation is adopted, the profile precision is closely related to the error created by the tool compensation profile, if the error of the compensating profile is too large, the defects of sinking, bulging or distortion and the like can be generated in the profile, so that the film sticking degree of the composite part is not satisfactory, gaps occur in the profile or at the edge during numerical control milling, so that the milling cannot be performed due to vacuum leakage, and even the pneumatic layout of the airplane is influenced. Therefore, the method is a key link for putting the tool compensation molded surface into production and application, and is used for accurately evaluating the molded surface construction error of tool compensation based on deformation simulation. However, in the prior art, only the composite material curing deformation simulation calculation and the tooling compensation profile construction based on the curing deformation simulation calculation are concerned, and how to evaluate the profile construction error is not considered, because the displacement compensation amount is increased, the tooling compensation profile has larger displacement relative to the original theoretical profile, and the displacement is the compensation amount or the profile error cannot be directly evaluated. Or in the existing technical research, because the research requirement does not relate to engineering application, the requirements of the numerical control milling molded surface and the pneumatic appearance precision which need to be considered in the engineering application do not need to be considered. In general technical research, only the compensation effect of tool compensation needs to be considered, subsequent numerical control milling and assembly are not involved, and the requirement for evaluating the profile construction error is not met.
Therefore, the method for evaluating the construction error of the tool compensation molded surface is provided, the construction error of the molded surface is separated, so that the quantitative evaluation can be carried out, and the situation that the tool compensation molded surface has larger displacement relative to the original theoretical molded surface, and the situation that the displacement is a compensation amount or the error of the molded surface cannot be directly evaluated is avoided. The accurate evaluation of the construction error of the tool compensation molded surface is realized.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a computer device in a hardware operating environment according to an embodiment of the present application.
As shown in fig. 1, the computer apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface, such as a WIreless-FIdelity (WI-FI) interface. The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of a computer device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a data storage module, a network communication module, a user interface module, and an electronic program.
In the computer device shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the computer device of the present invention may be disposed in the computer device, and the computer device calls the tooling compensation profile construction error evaluation device stored in the memory 1005 through the processor 1001 and executes the tooling compensation profile construction error evaluation method provided in the embodiment of the present invention.
Referring to fig. 2, based on the hardware device of the foregoing embodiment, an embodiment of the present application provides a tool compensation profile construction error evaluation method, including:
s102, processing the theoretical composite part molded surface needing curing deformation simulation and tool compensation by using geometric processing software to obtain the composite part molded surface.
In a specific implementation process, the theoretical composite part molded surface which needs to be subjected to solidification deformation simulation and tool compensation can be processed in CATIA or other geometric processing software, and the molded surface, the positioning hole, the lost layer area, the allowance line, the part line and other features are marked and distinguished in the form of molded surface lines, so that the molded surface of the composite part suitable for simulation analysis is obtained.
The theoretical composite part profile processed in this embodiment generally refers to a composite part film surface, which is a final profile of the composite part after molding, cutting, and the like, and further processing including allowance, lug holes, and the like needs to be performed on the inside and the boundary of the part to form a tool profile.
The method for processing the molded surface of the theoretical composite part comprises the following steps: in order to solve the problem that the tool compensates the warping of the molding surface on the margin edge, a simulation margin area needs to be further generated on the outer edge of the existing part margin area during the processing of the molding surface so as to meet the requirements of pushing the warping area outwards and ensuring smooth transition of the part area and the margin area; in order to solve the problem of positioning the positioning hole, the intersection point of the axis of the positioning hole and the film pasting surface needs to be marked on the film pasting surface by adopting the dividing function in the CATIA during the processing of the molded surface. And for the characteristics of a part line, a lost layer line contained in part, and the like, the profile of the theoretical composite part is processed by adopting the projection and cutting functions of the CATIA.
Specifically, the method comprises the steps of processing a theoretical composite part molded surface needing solidification deformation simulation and tool compensation in the CATIA, and enabling a composite part allowance line to extend outwards for a certain distance to serve as a simulation allowance through an extrapolation extension function of the CATIA, so that when a compensation molded surface is created, enough nodes are provided on the molded surface near the allowance line to guarantee the molded surface accuracy. Through the cutting function, turn into the characteristic curve of profile with part line, surplus line and locating hole, can discern when the follow-up net of being convenient for divides. And after the treatment is finished, obtaining the molded surface of the composite material part suitable for grid division and simulation modeling.
And S104, meshing the molded surface of the composite material part by using simulation software, and performing deformation simulation operation by using the molded surface of the composite material part after meshing to obtain a deformation simulation result.
In the specific implementation process, in Abaqus or other simulation analysis software, the molded surface of the composite material part is subjected to meshing, a simulation model is created according to the corresponding requirements of deformation simulation, and operation is carried out to obtain the deformation simulation result of the composite material part.
In this embodiment, when performing mesh division, it is necessary to distinguish the feature structures such as the part lines, the margin lines, and the positioning hole positions formed in step S102 by using mesh element boundaries, sparse mesh density, and the like, so that accurate recognition can be performed in the following.
Specifically, the processed geometric profile is led into simulation analysis software Abaqus, finite element meshing of the composite material part is achieved through a mesh meshing module, material parameters, process parameters and boundary constraint conditions are set, simulation analysis is achieved on the composite material part, and after deformation simulation calculation analysis, a data file including node information of all the composite material parts is output through a post-processing module.
And S106, performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file.
In a specific implementation process, a post-processing module of simulation software is used for exporting a calculation result of the profile of the theoretical composite part to form a deformation simulation result file, and under a normal condition, the result file comprises three groups of data of coordinates of nodes before deformation, coordinates of nodes after deformation and deformation of all grid nodes of the profile of the theoretical composite part, coordinates of the nodes after compensation are calculated according to a tool compensation theory, and a tool compensation result file comprising two groups of data of coordinates of the nodes before deformation and coordinates of the nodes after compensation is created again.
Therefore, specifically, the deformation simulation result comprises coordinates of nodes before deformation, coordinates of nodes after deformation and deformation of all grid nodes on the profile of the theoretical composite part; the step of performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file comprises the following steps:
according to the coordinates of the nodes before deformation, the coordinates of the nodes after deformation and the deformation, tool compensation calculation is carried out to obtain coordinates of the nodes after compensation;
and obtaining a tool compensation result file according to the compensated node coordinates and the pre-deformation node coordinates.
It can be understood that the tool compensation calculation is the tool compensation in the prior art, and is not described herein again. The tool compensation result file at least comprises a post-compensation node coordinate and a pre-deformation node coordinate, and the pre-deformation node coordinate and the post-compensation node coordinate are used for subsequently generating a pre-deformation molded surface and a post-compensation molded surface for subsequent error calculation.
And S108, processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation.
In a specific implementation process, the tool compensation result file can be imported into profile processing software such as CATIA (computer-graphics aided three-dimensional interactive application), and a profile before deformation and a profile after compensation are respectively created.
Specifically, grid node coordinates before and after deformation are imported into the CATIA, a geometric profile is generated through functions of point cloud, grids, the geometric profile and the like, and geometric characteristics such as part lines, allowance lines, positioning hole positions and the like are processed and generated.
It can be understood that no matter what type of profile modeling method is adopted, the creation process, the operation steps and the construction parameters of the profile before deformation and the profile after compensation are completely consistent so as to facilitate the subsequent error determination.
And S110, obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile.
In the specific implementation process, theoretically, the deformation calculation value of the profile before deformation and the profile of the theoretical composite part is 0, the two profiles are completely consistent, but because the profile before deformation is the profile of the theoretical composite part which is generated again after grid division and profile creation, certain profile construction errors exist. Specifically, the method of this embodiment splits the construction error of the tooling compensation profile into the profile compensation amount and the profile construction error. The profile compensation amount is the compensation amount during the tool compensation in the step S106, and the profile construction error is determined by the error of the newly created profile before deformation relative to the theoretical profile after the theoretical profile is subjected to the grid division-calculation-the profile is newly created, that is, the first profile construction error.
As an alternative embodiment, the distance error, the perimeter error, the area error and the positioning hole position error of the pre-deformation profile and the theoretical composite part profile are adopted.
Specifically, the error between the feature of the profile before deformation and the corresponding feature of the profile of the theoretical composite part may include errors such as the distance between the profiles, the perimeter of the part line and the margin line, the area of the part area and the margin area, and the position of the positioning hole.
And S112, evaluating the construction error of the tool compensation molded surface of the composite material part according to the construction errors of the molded surface before deformation, the molded surface after compensation and the first molded surface.
In a specific implementation process, the tool compensation result file derived in step S106 includes coordinates of nodes before deformation, coordinates of nodes after deformation, and coordinates of nodes after compensation, and these coordinate points are in one-to-one correspondence. In step S108, a pre-deformation profile is created based on the pre-deformation node coordinates, and a post-compensation profile is created based on the post-compensation node coordinates, wherein all creation processes of the two profiles are consistent, and the difference in displacement is that the post-compensation profile contains a displacement compensation value relative to the pre-deformation profile. Due to the fact that the displacement compensation value is increased, even under the same operation process and construction parameters, the molded surface before deformation and the molded surface after compensation have certain difference, and the difference is marked as a second molded surface construction error.
Therefore, as an alternative embodiment, the step of evaluating the tooling compensation profile build error of the composite part profile based on the pre-deformation profile, the post-compensation profile and the first profile build error comprises:
obtaining a second profile construction error according to the profile before deformation and the compensated profile;
and evaluating the tooling compensation profile construction error of the profile of the composite part according to the first profile construction error and the second profile construction error.
Specifically, the step of evaluating the tooling compensation profile construction error of the composite part profile according to the first profile construction error and the second profile construction error comprises:
obtaining a tool compensation profile construction error value of the profile of the composite part according to the first profile construction error and the second profile construction error;
and evaluating the construction error of the tool compensation molded surface of the composite material part according to the construction error value and the error threshold of the tool compensation molded surface.
In the specific implementation process, the error threshold is an error value meeting the compensation requirement, and as long as the error value of the tool compensation profile construction is smaller than the error threshold, the tool compensation operation is considered to be qualified, otherwise, the tool compensation operation is not qualified.
The second profile construction error comprising: the distance error, perimeter error, area error and positioning hole position error of the profile before deformation and the profile after compensation.
Thus, the tooling compensation profile build error = first profile build error + second profile build error,
as an optional implementation, after the step of evaluating the tooling compensation profile construction error of the composite part profile according to the pre-deformation profile, the compensated profile and the first profile construction error, the method further includes:
and if the construction error of the tooling compensation molded surface of the composite material part does not meet the preset error condition, returning to the step of performing meshing on the molded surface of the composite material part by using simulation software, performing deformation simulation operation on the molded surface of the composite material part after meshing to obtain a deformation simulation result, and circulating the construction error of the tooling compensation molded surface of the composite material part to meet the preset error condition.
In a specific implementation process, the preset error condition refers to an error requirement of tool compensation, and may be the error threshold. If the requirements are met, a compensation tool can be further manufactured and put into production and use; if the requirements are not met, returning to the step S104 to optimize the grid division size or the profile creation parameters until the evaluation is qualified, and ensuring that the features of the profile curvature, the part line, the allowance line, the position of the positioning hole, the axis and the like all meet the requirements of engineering application.
It should be understood that the above is only an example, and the technical solution of the present application is not limited in any way, and those skilled in the art can make the setting based on the actual application, and the setting is not limited herein.
As can be easily found from the above description, the method of the embodiment processes the profile of the theoretical composite material part to be subjected to solidification deformation simulation and tool compensation by using geometric processing software, so as to obtain the profile of the composite material part; meshing the molded surface of the composite material part by using simulation software, and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result; performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file; processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation; obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile; and evaluating the construction error of the tooling compensation molded surface of the composite material part according to the construction errors of the molded surface before deformation, the molded surface after compensation and the first molded surface. Namely, the method separates the profile construction errors, so that the profile construction errors can be quantitatively evaluated, and the problem that the compensation quantity of the displacements or the profile errors cannot be directly evaluated because the tool compensation profile has larger displacement relative to the original theoretical profile is avoided. The accurate evaluation of the construction error of the tool compensation molded surface is realized.
As an optional implementation manner, on the basis of the foregoing embodiment, the present embodiment optimizes the flow steps, and reduces the complexity of simulation calculation and compensation profile creation. The method comprises the following specific steps:
step S1: and processing the molded surface of the theoretical composite part.
In the embodiment, the profile of the theoretical composite part which needs to be subjected to solidification deformation simulation and tool compensation is processed in the CATIA, and the allowance line of the composite part extends outwards for a certain distance to serve as a simulation allowance through an extrapolation extension function of the CATIA, so that when a compensation profile is created, the profile near the allowance has enough nodes to ensure the accuracy of the profile. Through the cutting function, turn into the characteristic curve of profile with part line, surplus line and locating hole, can discern when the follow-up net of being convenient for divides. And after the processing is finished, obtaining the part molded surface suitable for grid division and simulation modeling.
Step S2: and (4) dividing a finite element mesh and performing simulation calculation.
In the embodiment, the processed geometric profile is led into simulation analysis software, finite element meshing of the composite material part is realized through a mesh meshing module, material parameters, process parameters and boundary constraint conditions are set, simulation analysis is realized on the composite material part, and after calculation and analysis, a data file comprising node information of all the composite material parts is output through a post-processing module.
In this embodiment, the calculation and analysis process is simplified compared with the foregoing embodiment, all calculation steps required for the deformation simulation may not be completely executed, and it is only necessary to ensure that the post-processing model can output mesh node data before deformation, and there is no requirement for the mesh node data after deformation.
Step S3: and (6) processing a calculation result.
In this embodiment, in the Abaqus post-processing module, the result of calculating the profile of the theoretical composite part is exported to form a deformation simulation result file, and in a general case, the result file includes three sets of data, namely coordinates of nodes before deformation, coordinates of nodes after deformation, and deformation amount of all mesh nodes of the profile of the theoretical composite part, and coordinates of mesh nodes before deformation are extracted.
Step S4: creating a pre-deformation profile.
In the embodiment, grid node coordinates before deformation are imported into the CATIA, a geometric profile is generated through functions of point cloud, grid, geometric profile and the like, and geometric features such as part lines, allowance lines, positioning hole positions and the like are processed and generated.
Step S5: and evaluating the construction error of the profile before deformation.
In this embodiment, the errors between the features of the profile before deformation and the corresponding features in the design digifax are compared, including the errors of the distance between the profiles, the circumferences of the part line and the margin line, the areas of the part area and the margin area, the position of the positioning hole, and the like, and are recorded as error 1.
Step S6: and evaluating the construction error of the compensated molded surface by using the construction error of the molded surface before deformation.
In this embodiment, considering that in the foregoing embodiment, under the same operation flow, steps and parameters, errors 2 such as a distance, a perimeter, an area, a positioning hole position, and the like between the deformed molding surface and the pre-deformed molding surface are substantially 0, it may be considered that the tooling compensation molding surface construction error = error 1.
And according to design or process requirements, evaluating the tool compensation molded surface construction errors of the characteristics of the part line, the allowance line, the positioning hole and the like. If the requirements are met, a compensation tool can be further manufactured and put into production and use; if the requirements are not met, returning to the step S2 to optimize the grid division size or the profile creation parameters until the evaluation is qualified, and ensuring that the features of the profile curvature, the part line, the allowance line, the positioning hole position, the axis and the like all meet the requirements of engineering application.
Step S7: and (5) performing deformation simulation operation.
In the embodiment, in Abaqus, a simulation operation model is created for the grid element model qualified in the previous error analysis according to a simulation flow, and modeling simulation operation is performed to obtain a deformation simulation result.
Step S8: and creating a tooling compensation profile.
In this embodiment, after the deformation simulation calculation is completed, a tool compensation model is created according to a tool compensation theory, and a compensation tool is further manufactured and put into production use.
It should be understood that the above is only an example, and the technical solution of the present application is not limited in any way, and those skilled in the art can make the setting based on the actual application, and the setting is not limited herein.
It is obvious from the above description that the method of the present embodiment further simplifies the error evaluation steps based on the foregoing embodiments, reduces the complexity of simulation calculation and compensation profile creation, and further improves the efficiency of error evaluation.
Referring to fig. 3, based on the same inventive concept, an embodiment of the present application further provides a tool compensation profile construction error evaluation apparatus, including:
the first profile creating module is used for processing the profile of the theoretical composite part to be subjected to solidification deformation simulation and tool compensation by using geometric processing software to obtain the profile of the composite part;
the deformation simulation module is used for meshing the molded surface of the composite material part by using simulation software and performing deformation simulation operation by using the molded surface of the composite material part after meshing to obtain a deformation simulation result;
the tool compensation module is used for performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file;
the second profile creating module is used for processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation;
the error construction module is used for obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile;
and the error evaluation module is used for evaluating the tooling compensation profile construction error of the composite part profile according to the pre-deformation profile, the post-compensation profile and the first profile construction error.
It should be noted that, in this embodiment, each module in the device for evaluating a construction error of a tool compensation profile corresponds to each step in the method for evaluating a construction error of a tool compensation profile in the foregoing embodiment one by one, and therefore, the specific implementation and achieved technical effects of this embodiment may refer to the implementation of the method for evaluating a construction error of a tool compensation profile, which is not described herein again.
Furthermore, in an embodiment, the present application also provides a computer device comprising a processor, a memory and a computer program stored in the memory, which when executed by the processor, implements the steps of the method in the foregoing embodiments.
Furthermore, in an embodiment, the present application further provides a computer storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the method in the foregoing embodiments.
In some embodiments, the computer-readable storage medium may be memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash, magnetic surface memory, optical disk, or CD-ROM; or may be various devices including one or any combination of the above memories. The computer may be a variety of computing devices including intelligent terminals and servers.
In some embodiments, executable instructions may be written in any form of programming language in the form of programs, software modules, scripts or code and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. The programming language may include, among other things, a compiled or interpreted language, or a declarative or procedural language.
By way of example, executable instructions may, but need not, correspond to files in a file system, and may be stored as part of a file that holds other programs or data, e.g., in one or more scripts in a hypertext Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files, e.g., files that store one or more modules, sub-programs, or portions of code.
By way of example, executable instructions may be deployed to be executed on one computing device or on multiple computing devices at one site or distributed across multiple sites and interconnected by a communication network.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on this understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a multimedia terminal to execute the methods according to the embodiments of the present application. The storage medium may be a read-only memory/random access memory, a magnetic disk, an optical disk, etc., and the multimedia terminal device may be a mobile phone, a computer, a television receiver, or a network device, etc.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (8)
1. A method for evaluating construction errors of a tool compensation molded surface is characterized by comprising the following steps:
processing the profile of the theoretical composite part needing curing deformation simulation and tool compensation by using geometric processing software to obtain the profile of the composite part;
meshing the molded surface of the composite material part by using simulation software, and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result;
performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file;
processing the tool compensation result file by using geometric processing software to obtain a profile before deformation and a profile after compensation;
obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile;
obtaining a second profile construction error according to the profile before deformation and the compensated profile;
obtaining a tool compensation profile construction error value of the profile of the composite part according to the first profile construction error and the second profile construction error;
and evaluating the construction error of the tool compensation molded surface of the composite material part according to the construction error value and the error threshold value of the tool compensation molded surface.
2. The method of claim 1, wherein the first profile build error comprises: and the distance error, perimeter error, area error and positioning hole position error of the profile before deformation and the profile of the theoretical composite part.
3. The method of claim 1, wherein the second profile construction error comprises: the distance error, perimeter error, area error and positioning hole position error of the profile before deformation and the profile after compensation.
4. The method of claim 1, wherein the deformation simulation result comprises coordinates of nodes before deformation, coordinates of nodes after deformation and deformation of all grid nodes on the profile of the theoretical composite part; the tool compensation calculation is carried out according to the deformation simulation result to obtain a tool compensation result file, and the tool compensation result file comprises the following steps:
according to the coordinates of the nodes before deformation, the coordinates of the nodes after deformation and the deformation, tool compensation calculation is carried out to obtain coordinates of the nodes after compensation;
and obtaining the tool compensation result file according to the compensated node coordinates and the pre-deformation node coordinates.
5. The method of claim 1, wherein after evaluating the tooling compensation profile build error for the composite part profile based on the pre-deformation profile, the post-compensation profile, and the first profile build error, further comprising:
and if the construction error of the tooling compensation molded surface of the composite material part does not meet the preset error condition, returning to the step of meshing the molded surface of the composite material part by using simulation software and performing deformation simulation operation by using the meshed molded surface of the composite material part to obtain a deformation simulation result, and circulating the construction error of the tooling compensation molded surface of the composite material part to meet the preset error condition.
6. The utility model provides a frock compensation profile constructs error evaluation device which characterized in that includes:
the first profile creating module is used for processing the profile of the theoretical composite part to be subjected to solidification deformation simulation and tool compensation by using geometric processing software to obtain the profile of the composite part;
the deformation simulation module is used for meshing the molded surface of the composite material part by using simulation software and performing deformation simulation operation by using the molded surface of the composite material part after meshing to obtain a deformation simulation result;
the tool compensation module is used for performing tool compensation calculation according to the deformation simulation result to obtain a tool compensation result file;
the second profile creating module is used for processing the tool compensation result file by using the geometric processing software to obtain a profile before deformation and a profile after compensation;
the error construction module is used for obtaining a first profile construction error according to the pre-deformation profile and the theoretical composite part profile;
the error evaluation module is used for obtaining a second profile construction error according to the pre-deformation profile and the compensated profile; obtaining a tool compensation profile construction error value of the profile of the composite part according to the first profile construction error and the second profile construction error; and evaluating the construction error of the tool compensation molded surface of the composite material part according to the construction error value and the error threshold value of the tool compensation molded surface.
7. A computer arrangement, characterized in that the computer arrangement comprises a memory in which a computer program is stored and a processor which executes the computer program for implementing the method as claimed in any one of claims 1-5.
8. A computer-readable storage medium, having a computer program stored thereon, which, when executed by a processor, performs the method of any one of claims 1-5.
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